The history of the domesticated sheep goes back to between 11000 and 9000 BC, and the domestication of the wild mouflon in ancient Mesopotamia. Sheep are among the first animals to have been domesticated by humans, and there is evidence of sheep farming in Iranian statuary dating to that time period.
Answer:
500-million-year-old fossil found in BC is ancient ancestor of spiders and scorpions. Palaeontologists in British Columbia have found a fossil of the oldest known ancestor of scorpions and spiders.
Answer:You may feel hungry frequently if your diet lacks protein, fiber, or fat, all of which promote fullness and reduce appetite. Extreme hunger is also a sign of inadequate sleep and chronic stress. Additionally, certain medications and illnesses are known to cause frequent hunger.
Explanation:
"Hunger hormones" (ghrelin) in your blood and an empty stomach signal the brain when you're hungry. Nerves in the stomach send signals to the brain that you're full, but these signals can take up to 20 minutes to communicate -- and by that time, you may have already eaten too much.
Answer:
Hotspot
Explanation:
Volcanoes can form in three different places: a convergent boundary, a divergent boundary, or a hot spot.
-At a convergent plate boundary, two plates collide and form a subduction zone. In the subduction zone, the denser, heavier plate goes below the more buoyant plate. The plate that goes under is subjected to immense heat and pressure and melts to form magma. This magma is less dense than the surrounding solid rock and rises to the surface through cracks in the plates to form a volcano.
- Volcanoes will form along divergent plate boundaries. A divergent boundary is when the plates move apart from each other. When the plates part, magma from under either plate rises and forms a volcano.
-A hotspot is the third place a volcano can form. This particular type is the least common. Hot spots are when thermal plumes from deep in the Earth rises. This heat, combined with the lower pressure at the bottom of the lithosphere, causes magma to form. The magma, as we discussed, is less dense than the surrounding solid crust and rises to the surface through cracks and channels and then erupts at the surface to form a volcano.
Answer:
The Citric Acid cycle and Electron Transport chain processes are part of a set of steps that occurs in cellular respiration.
During cellular respiration, a glucose molecule is gradually decomposed into carbon dioxide and water. Along the way, some ATPs are produced directly in the reactions that transform glucose. However, much later ATP is produced in a process called oxidative phosphorylation. Oxidative phosphorylation is fueled by the movement of electrons through the electron transport chain, a series of proteins incorporated into the inner membrane of mitochondria. Thus, Citric Acid cycle is responsible for degrading the acetyl CoA produced by previous reactions (glycolysis and pyruvate oxidation) producing four more carbon dioxide molecules, plus energized electrons and H + ions, which will be captured by NAD + and another acceptor. of electrons and hydrogen called FAD (Flavine Adenine Dinucleotide), originating NADH and FADH2 molecules. During this process, two GTP (Guanosine triphosphate - very similar to ATP) molecules are also formed. After this process, through the electron transport chain reaction NAD and FADH2 produced in the other steps deposit their electrons in the electron transport chain returning to the "pure" form (NAD + and FADH2). As electrons travel down the chain, energy is released that is used to pump protons out of the matrix, forming a gradient. Protons return to the matrix by means of an enzyme called ATP synthase, producing ATP. At the end of the electron transport chain, oxygen receives electrons and acquires protons to form water.
Explanation:
